1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alex
3 years ago
7

The karyotype for trisomy 21 illustrates an example of a genetic mutation caused by A) insertion. B) inversion. C) crossing over

. D) nondisjunction.
Biology
2 answers:
Katyanochek1 [597]3 years ago
7 0

Trisomy 21, as illustrated by the karyotype, is caused by nondisjunction. This occurs when chromosomes do not separate properly during meiosis.

Answer is D) nondisjunction

aivan3 [116]3 years ago
3 0

Answer:

The correct answer is option C, that is, nondisjunction.

Explanation:

Trisomy 21, also called Down syndrome is a result of the error in the cell division known as nondisjunction. It leaves an egg or sperm cell with an additional copy of chromosome 21 prior to or after conception.  

The phenomenon of nondisjunction can take place during anaphase of meiosis or mitosis. At the time of anaphase, the homologous chromosomes or the sister chromatids get separate and move to the contrary poles of the cell, with the help of microtubules. However, in nondisjunction, this separation does not take place.  

You might be interested in
The lesson question for this lab is “What is the effect of the type of food available on the frequency of different types of bir
Effectus [21]

Answer:

Hypothesis If the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

Explanation:

4 0
3 years ago
Read 2 more answers
When a bat is hibernating, how fast does its heart pump?
Sever21 [200]

Answer:

20 beats per minute

Explanation:

6 0
3 years ago
Read 2 more answers
What are the ten biomes, and what appears to be the most prominent biome in North America, South America, Asia, Africa, Australi
Dima020 [189]
Well, the ten biomes are:
Tropical Rainforests, Sub-tropical rainforests, savanna, tundra, arctic, boreal forests, conniferous forests, mediterrean, grassland, and desert
3 0
3 years ago
Albinism is inherited as autosomal recessive trait. The frequency of the disease in the population equals to 1:20 000. Calculate
prisoha [69]

Answer:

0.0139- frequency of heterozygotes in the population

Explanation:

Let q to the power of 2 represents the frequency of the homozygous recessive (aa) = 1/20000 = 0.00005

This, q = √q^2 = √0.00005 = 0.007

Since p + q = 1

p = 1 - 0.007 = 0.993

Using the formula: p^2 + 2pq + q^2

Where 2pq represents the frequency of the heterozygotes, thing we have

2 x 0.007 x 0.993

= 0.0139

8 0
3 years ago
Which organelle in the table is correctly matched with its function?
zubka84 [21]

Answer:

<em>B. Cell wall </em>

Explanation:

All the others are wrong, and this is the answer on Edgenuity :)

5 0
3 years ago
Other questions:
  • What are the bone markings of a chicken wing?
    13·2 answers
  • Distinguish between diffusion and equilibrium
    6·1 answer
  • Which of these phenomenà cause uneven heating of the Earth?​
    11·1 answer
  • Why must you do mitosis
    11·1 answer
  • Name the fluid present between arachnoid and pia mater<br>​
    10·2 answers
  • In human traits, having dimples is dominant over not having dimples. If a mother heterozygous with dimples (Dd) and a father wit
    12·1 answer
  • Please help me outtttt
    10·2 answers
  • Question 10: If this scenario continues, what do you think will happen to the populations in the next 100 years? Why do you thin
    10·2 answers
  • Why is Sodium stored in oil?​
    13·1 answer
  • What do you mean by transplantation??​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!